I just got off the phone with them as I have been meaning to call them about one of my thermocouples. The other day I hooked into my passenger side thermocouple to find that it was giving erroneous readings. Dont know what the deal with it is but it was way out of its normal voltage range. I just called them and they told me to send it back to them and they would send me a new one so I asked what I should do about the hole that would be left. So he said .. "dont worry about it, I'll send one out priority this afternoon and just send the bad one back to me when you swap them out.... what's you address again..." $40 thermocouples. 712-D2K (1/8" NPT threads, 2.25"L X 3/16 thick) [ [ http://www.frostalarm.com/cat/p33.html ] ]
You can either purchase their guages (they even have a dual-EGT instrument guage) or just use a voltmeter. It comes with a voltage->temperature conversion sheet and the thermocouple has a linear temp/voltage relationship. For those with the Zemulator, there will be an option to strap these into it for monitoring/datalogging/etc etc.